<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    class App extends React.Component{
      state = {
        count: 0,
        isHot: true
      }
      render(){
        const {count,isHot} = this.state
        return (
          <div>
            <button onClick={this.handle}>+</button>
            <p>{count}</p>  
            <button onClick={this.changeT}>改变天气</button>
            <p>{isHot?'热热热':"冷冷冷"}</p>
          </div>
        )
      }
      handle = ()=>{
        let {count} = this.state
        this.setState({count: ++count})
      }
      changeT = ()=>{
        let {isHot} = this.state
        this.setState({isHot: !isHot})
      }
    }
    ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
    // class App extends React.Component{
    //   state = {
    //     count: 0,
    //     isHot: true
    //   }
    //   render(){
    //     const {count,isHot} = this.state
    //     return (
    //       <div>
    //         <button onClick={this.handle}>+</button>
    //         <p>{count}</p>
    //         <button onClick={this.changeTq}>变天气</button>
    //         <p>{isHot?'热':'凉'}</p>
    //       </div>
    //     )
    //   }
    //   handle = ()=>{
    //     let {count} = this.state
    //     this.setState({count: ++count})
    //   }
    //   changeTq = ()=>{
    //     let {isHot} = this.state
    //     this.setState({isHot:!isHot})
    //   }
    // }
    // ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
    // class App extends React.Component{
    //   state = {
    //     count: 0,
    //     isHot: true
    //   }
    //   render(){
    //     const {count,isHot} = this.state
    //     return (
    //       <div>
    //         <button onClick={this.handle}>+</button>
    //         <p>{count}</p> 
    //         <button onClick={this.changeWeaHandle}>天气变</button> 
    //         <p>{isHot?'热吖':'冷吖'}</p>
    //       </div>
    //     )
    //   }
    //   handle = ()=>{
    //     this.setState({count:this.state.count+1})
    //   }
    //   changeWeaHandle = ()=>{
    //     let {isHot} = this.state
    //     this.setState({isHot:!isHot})
    //   }
    // }
    // ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
    // class App extends React.Component{
    //   state = {
    //     count:0,
    //     isHot:true
    //   }

    //   render(){
    //     console.log("----render----");
    //     const {count,isHot} = this.state;
    //     return (
    //       <div>
    //         <button onClick={this.handle} >+</button>
    //         <p>{count}</p>

    //         <button onClick={this.changeWeaHandle}>切换天气</button>
    //         <p>{isHot?"热啊":"冷啊"}</p>
    //       </div>
    //     )
    //   }

    //   //事件函数
    //   handle = () => {
    //     let {count} = this.state;
    //     // this.setState({count:++count})
    //     this.setState({count:count + 1})
    //   }

    //   changeWeaHandle = () => {
    //     const {isHot} = this.state;
    //     this.setState({isHot:!isHot})
    //   }
    // }

    // const root = ReactDOM.createRoot(document.getElementById('app'));
    // root.render(<App/>)




  </script>
</body>

</html>